linux-kernel - Re: [PATCH] mm: memcontrol: fix handling of swapaccount parameter

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Date:	Wed, 14 Aug 2013 20:36:04 +0200
From:	Michal Hocko <mhocko@...e.cz>
To:	Gergely Risko <gergely@...ko.hu>
Cc:	cgroups@...r.kernel.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org
Subject: Re: [PATCH] mm: memcontrol: fix handling of swapaccount parameter

On Wed 14-08-13 15:21:35, Gergely Risko wrote:
> Fixed swap accounting option parsing to enable if called without argument.

We used to have [no]swapaccount but that one has been removed by a2c8990a
(memsw: remove noswapaccount kernel parameter) so I do not think that
swapaccount without any given value makes much sense these days.

> Signed-off-by: Gergely Risko <gergely@...ko.hu>
> ---
>  mm/memcontrol.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index c290a1c..8ec2507 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -6970,13 +6970,13 @@ struct cgroup_subsys mem_cgroup_subsys = {
>  static int __init enable_swap_account(char *s)
>  {
>  	/* consider enabled if no parameter or 1 is given */
> -	if (!strcmp(s, "1"))
> +	if (*s++ != '=' || !*s || !strcmp(s, "1"))
>  		really_do_swap_account = 1;
>  	else if (!strcmp(s, "0"))
>  		really_do_swap_account = 0;
>  	return 1;
>  }
> -__setup("swapaccount=", enable_swap_account);
> +__setup("swapaccount", enable_swap_account);
>  
>  static void __init memsw_file_init(void)
>  {
> -- 
> 1.8.3.2
> 
> --
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-- 
Michal Hocko
SUSE Labs
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